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Genetic problem

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Genetic problem

Postby qwerty73 » Mon Oct 11, 2010 7:02 am

Could you please help me with these genetic questions:

Pea pod shape is controlled by a one gene - two allele genetic system. Full pod shape is completely dominant to constricted pea pod shape. Pea plant size is also controlled by a one gene – two allele system with tall size being completely dominant to dwarf size. Given a plant was heterozygous for pod shape and homozygous recessive for plant size:

a. What is the phenotype of this plant?

b. If this plant was crossed to a dihybrid (heterozygote), what would be the phenotypic ratio of pod shape among the progeny?

c. What would be the phenotypic ratio of plant size?

d. What would be the phenotypic ratio of pod shape and plant size together?
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Postby JackBean » Mon Oct 11, 2010 8:02 am

so, if is it heterozygous, what shape will it have? If is it homozygous for size, that should be quite clear :roll:

so, your's Sstt and the dihybrid is SsTt, just make the square... from that you will get the ratios...

Cis or trans? That's what matters.
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Postby canalon » Tue Oct 12, 2010 8:15 pm

and please RTFM

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)
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